The "Ask your hard questions" thread (Non-HSC) (1 Viewer)

[Casmira]

Consolidate all your non-HSC paper questions here, even I have one

 

[Tommy_69]

B

10char

 

[Casmira]

how'd you find that out mr 2u D:

 

[Tommy_69]

they are called like the triangular kings or something i deno

3 + 4 + 5

fuck its hard to explain here on computer

just use pythag and u will find out its a right angle.

3^2 = 9
4^2 = 16

9 + 16 = 25

square root of 25

= 5

therefore right angle

 

[Peartie]

Thats easy....its a right angled triangle no doubt....as Tommy said use pytahag if u want

 

[Trev]

they are called like the triangular kings or something i deno

Pythagorian triads?

 

[100percent]

This is hsc, but i could never do these further questions in mechanics.

A small ring C can move freely on a light inextensible string. The two ends of the string are attached to points A and B, where A is vertically above B and at a distance c from it. When the ring C is describing a horizontal circle with constant angular velocity w, the distance of C from A and B are b and a respectively.

show that
2gc(a+b)=w²(a-b)[c²-(a+b)²}

 

[Tommy_69]

...right....Anyway, anyone feel free to ask more questions in association with GENERAL meaning NO CALCULUS or MECHANICAL 4unit shit

 

[Tommy_69]

Pythagorian triads?

lol yes those

 

[th]

hey when ur finding the gradient in correlation what
y1-y2/x1-x2

do u use ?

is it the closes ones to do line of best fit?

 

[Tommy_69]

use the points which are dead on the line of best fit. if there are none on the line of best fit, use the points on the axis

 

[th]

use the points on the axis???????


should it come out as a fraction or decimal because my fucked up teacher used to give em out as decimal but in MANSW solutions and other textbooks its in fractions

 

[100percent]

...right....Anyway, anyone feel free to ask more questions in association with GENERAL meaning NO CALCULUS or MECHANICAL 4unit shit

how did you know it was 4unit?
4unit isn't too bad, we get basic questions like square root minus twenty five as well
ie. sq rt -25

 

[aurora_05]

use the points on the axis???????


should it come out as a fraction or decimal because my fucked up teacher used to give em out as decimal but in MANSW solutions and other textbooks its in fractions

Use y2-y1/x2-x1 and you should end up with either a fraction or a whole number.
I think by points on the axis Tommy meant that you pick a random point on the line and work out its co-ordinates based on where it is in relation to the axis. does that make sense? I think I just made that even more confusing....